Check Leap Year in JavaScript Programming Language

Code (Prompt)


            let year = prompt("Enter a year:");
            let result = (year % 4 === 0 && (year % 100 !== 0 || year % 400 === 0)) ? `${year} is a leap year.` : `${year} is not a leap year.`;
            alert(result);

Output

Enter a year: 2000
2000 is a leap year.

Code (Assigned Value)


            const year = 2024;  // Assigned value
            if ((year % 4 === 0 && year % 100 !== 0) || (year % 400 === 0)) {
                alert(`${year} is a leap year.`);
            } else {
                alert(`${year} is not a leap year.`);
            }

Output

2024 is a leap year.

Code (Alert)


            const year = 2024;  // Assigned value
            const result = (year % 4 === 0 && (year % 100 !== 0 || year % 400 === 0)) ? `${year} is a leap year.` : `${year} is not a leap year.`;
            alert(result);

Output

2024 is a leap year.

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